1、Unit4 Global Warming The Earth Is Becoming Warmer But Does It Matter?Work in groups-list things as required:1.Things that consume energy around us or at any other places.2.Sources of energy Warming up I(m)Things that use energyIn a houselights television cassette player computerfridge stove washing
2、machine hairdryer video recorder coal oilnatural gas wind(power)sun(solar energy)water(hydro-electric power)the sea(tidal energy)uranium(nuclear energy)plant(biomass energy)Windmills,renewable.What?Renewable?Warming up P 25What?Renewable?A coal power station,non-renewable.What?Renewable?An oil refin
3、ery(精炼厂精炼厂),non-renewable.What?Renewable?A nuclear power station,non-renewable.solar panels renewableWhat?Renewable?What?Renewable?A hydro-electric dam,renewable.Geothermal(地热的地热的)Energy Plant What is the greenhouse made of and used for?What is this?The sun.Greenhouse How does it work?The air inside
4、 is warm because the glass traps the heat from the sun and keeps it from escaping.This makes the greenhouse heat up and so the plants can grow throughout the cold period.Questions What is greenhouse What is greenhouse effect?effect?green house effectCarbon-dioxideThe leading gasses are:Carbon-dioxid
5、eMethaneOzone(O3)Nitrous Oxide(N2O)Which greenhouse gases do you know?As the earth is becoming warmer,there are many disasters.tsunamiThe rise of the sea levelfloodssnow disasterfaminesthe spread of diseasesdroughtsListen to the tape and find out the main idea of the passage:Reading Part 1(Paragraph
6、s 1)Part 2(Paragraphs 2-5)Part 3(Paragraphs6)Introduce a debate over the issue of global warming.Describe how global warming comes about.List two different attitudes among scientists towards global warming.Part 4(Pa 7)Its up to readers to think and decide whether people should do something about glo
7、bal warming or not.Choices.1.Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A.Dr.Janice Foster.B.Charles Keeling.C.George Hambley.D.Sophie Armstrong.BReading IV(3m)2.The author probably agrees that _A.actually global warming is good for mankind.B.we should do nothing about the global warming.C.catastrophes will happen if the globe keeps on warming.D.a lot remains to be found out about the effects of global warming.DWhat can we do about global warming?Homework ABWhat can we do about global warming?Comprehending:P 27 1-2
